What you learned

These projects began introducing you to the more difficult parts of SwiftUI, although none of it was really SwiftUI’s fault – it’s the places where SwiftUI meets Apple’s older frameworks that things get a little rough. Over time these rough edges will get smoothed off a little, but it might be a few years and regardless these will still be important for any times you want to integrate code from outside of Apple.

While completing the three projects, you also learned:

How property wrappers become structs
Creating custom bindings
Presenting action sheets with lots of buttons
Using Core Image to manipulate images
Integrating UIImagePickerController into SwiftUI
Integrating MKMapView into SwiftUI
Writing coordinator classes that can act as delegates for image pickers and map views
Dropping pins on maps
Saving images to the user’s photo library
Adding Comparable conformance to custom types
Finding and writing to the user’s documents directory
Enabling file encryption when writing
Authenticating users with Touch ID and Face ID